Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1990-08-13
1991-09-17
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
356 30, 356402, G01J 350, H01J 516, H01J 4014
Patent
active
050497367
ABSTRACT:
A geological age measurement apparatus by the color measurement of zirconium comprises an arithmetic recording computer including a recording medium input/output unit medium connected to both a measured result storage medium and a control storage medium including a calibration curve preparation program showing the relation between the color of zirconium and its geological age, an age arithmetic program for calculating the geological age from the color and a basic program. The apparatus allows the evaluation of geological age by color measurement easily, promptly and inexpensively without using any large expensive instruments. The evaluation of geothermal heat storage layers and heat source is done almost spontaneously while geothermal walls are being bored for their tests.
REFERENCES:
patent: 3944368 (1976-03-01), Beesley
patent: 3947120 (1976-03-01), Bar-Issac et al.
patent: 4461568 (1984-07-01), Welbourn et al.
patent: 4527895 (1985-07-01), Rubin
patent: 4906083 (1990-03-01), Sattler
Lee John R.
Mason, Jr. Joseph C.
Nelms David C.
Oujevolk George B.
Sekiyushigen Kaihatsu Kabushiki Kaisha
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